Method for manufacturing an injection device with a bypass channel and tool for this purpose
AssigneeGerresheimer Regensburg GmbH
InventorsFranz KALB, Christian LANZL
Life of this patent
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Abstract
A tool and a method for manufacturing a bypass in an injection device are disclosed. The preforms of the injection device are inserted into a tool. A partial region of the cylindrical portion is heated by a heat source. The heated partial region of the cylindrical portion is plastically deformed with a male die part of the tool, so that the bypass channel is formed.
Claims9
A method for manufacturing an injection device with a bypass channel, comprising the following steps:
- inserting a preform into a tool so that the preform partially rests with a cylindrical outer surface of a cylindrical portion in the tool;
- heating a partial region of the cylindrical portion;
- inserting a male die part into the cylindrical portion substantially in an axial direction;
- displacing the male die part in a radial direction on a cylindrical inner surface of the cylindrical portion of the preform;
- and
- pressing the male die part into the heated partial region of the cylindrical portion and thereby forming the bypass channel by plastic deformation of the heated partial region.
A tool for manufacturing an injection device with a bypass channel, wherein the tool is configured such that it supports at least one cylindrical portion of the preform, the tool comprises:
- a heat source is arranged in the tool for heating a partial region of the cylindrical portion of the preform opposite a cylindrical outer surface of the cylindrical portion;
- and
- a male die part of the tool is provided, which can be moved into the preform in an axial direction and in the preform in a radial direction towards the heated partial region.
Dependencies are inferred from the claim text.